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All results from a given calculation for CH3SiH3 (methyl silane)

using model chemistry: PBEPBE/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at PBEPBE/aug-cc-pVTZ
 hartrees
Energy at 0K-331.009355
Energy at 298.15K-331.015174
Nuclear repulsion energy62.341066
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at PBEPBE/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 2979 2959 4.44      
2 A 2147 2134 59.33      
3 A 1236 1228 10.36      
4 A 896 890 182.60      
5 A 681 677 9.89      
6 A 188 187 0.00      
7 E 3058 3038 5.56      
7 E 3058 3038 5.56      
8 E 2155 2141 121.86      
8 E 2155 2141 121.88      
9 E 1411 1402 2.75      
9 E 1411 1402 2.75      
10 E 918 912 27.33      
10 E 918 912 27.33      
11 E 854 849 57.49      
11 E 854 849 57.48      
12 E 501 497 7.94      
12 E 501 497 7.94      

Unscaled Zero Point Vibrational Energy (zpe) 12959.0 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 12874.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at PBEPBE/aug-cc-pVTZ
ABC
1.84584 0.35920 0.35920

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/aug-cc-pVTZ

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.251
Si2 0.000 0.000 0.637
H3 -1.026 -0.000 -1.641
H4 0.513 0.889 -1.641
H5 0.513 -0.889 -1.641
H6 1.403 -0.000 1.169
H7 -0.701 1.215 1.169
H8 -0.701 -1.215 1.169

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88801.09811.09811.09812.79682.79682.7968
Si21.88802.49882.49882.49881.50001.50001.5000
H31.09812.49881.77781.77783.71433.07873.0785
H41.09812.49881.77781.77783.07873.07853.7143
H51.09812.49881.77781.77783.07853.71433.0787
H62.79681.50003.71433.07873.07852.42932.4293
H72.79681.50003.07873.07853.71432.42932.4293
H82.79681.50003.07853.71433.07872.42932.4293

picture of methyl silane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 Si2 H6 110.764 C1 Si2 H7 110.764
C1 Si2 H8 110.764 Si2 C1 H3 110.822
Si2 C1 H4 110.822 Si2 C1 H5 110.822
H3 C1 H4 108.087 H3 C1 H5 108.087
H4 C1 H5 108.087 H6 Si2 H7 108.148
H6 Si2 H8 108.148 H7 Si2 H8 108.148
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.630      
2 Si 0.658      
3 H 0.182      
4 H 0.182      
5 H 0.182      
6 H -0.192      
7 H -0.192      
8 H -0.192      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.828 0.828
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.215 0.000 0.000
y 0.000 -23.215 0.000
z 0.000 0.000 -23.435
Traceless
 xyz
x 0.110 0.000 0.000
y 0.000 0.110 0.000
z 0.000 0.000 -0.220
Polar
3z2-r2-0.440
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.425 0.000 0.000
y 0.000 6.425 0.000
z 0.000 0.000 7.625


<r2> (average value of r2) Å2
<r2> 50.857
(<r2>)1/2 7.131